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Finding the Fourth Proportional to 395,121.47, 544,813.11 and 291,905.03

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Solution

The fourth proportional to 395,121.47, 544,813.11 and 291,905.03 is: 402,493.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,121.47 : 544,813.11 = 291,905.03 : x
  2. Step 2: Convert to fraction form
    395,121.47/544,813.11 = 291,905.03/x
  3. Step 3: Cross multiply
    395,121.47x = 544,813.11 × 291,905.03
  4. Step 4: Simplify right side
    395,121.47x = 159,033,688,580.98
  5. Step 5: Solve for x
    x = 159,033,688,580.98/395,121.47
  6. Step 6: Final answer
    x = 402,493.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.